226 MICROSCOPIC FUNGI. 



Triehobasis Galii, Lev. Bedsteaw Hust ; spots yeliow- 

 isli ; sori subrotund, aggregate, closed ; spores globose, ledaisli. 

 — On GaHum verum, saxatile, &c. July and August. Uredo 

 spores of Puccinia galiorum. 



Triehobasis fallens, Cooke. Clover Rust ; spots obli- 

 terated ; son amphigenous, numerous, scattered, subrolund, 

 brown, surrounded by the remains of the ruptured epidermis ; 

 spores sub-ovate ; pedicels shorf, hyaline, evanescent ; epispore 

 verrucose. Uredo fallens^ Desmz. — On leaves of Clover, &c. 

 September. IS'ot uncommon. Uredo spores of P2^cm/tf./«//e;2s. 



Triehobasis suaveolens, Lev. Thistle Rust,- spots 

 obliterated, yeilow on the opposite side; sori subrotund, nearly- 

 plain, s^cattered, at length coniiuent, on the under surface, sur- 

 rounded by the ruptured epidermis ; spores globose, brown. — On 

 leaves of Thistle.-, frequently covering the whole under surface. 

 Summer. Common. (Plate VI i. figs. 151-153.) 



Triehobasis Polygonorum, B. Knotgrass Rtjst ; spots 

 ri d-yellow, widely effused; sori subrotund, scattered, sometimes 

 forming a ring, epidermis at length bursting ; spores somewhat 

 obovate, brown. — On Polygonum aviculare^ amphibium, and other 

 species. July to Septeuiber. Common. Uredo spores of 

 Puccinia Polygonorum. 



Triehobasis Vinese, B. Periwinkle Rust ; spots yellow- 

 ish ; sori small, subrotund, and oval, on the under surface, sur- 

 rounded by the ruptured epidermis ; spores oval, rather ovoid, 

 brown. — On leaves of Finca major. May and June. Uredo 

 spores of Puccinia Vincce. (Plate VI. figs. 130, 131.) 



Triehobasis Violarum, B. Violet Rust ; spots yellow- 

 ish; sori subrotund, scattered, generally on the under suriace ; 

 epidermis ruptured, persistent ; spores subglobose, brown. — On 

 leaves and petioles of Violets. July. Not uncommon. Uredo 

 spores of Puccinia Viol^e. 



Triehobasis Parnassise, Cooke. Grass of Parnassus 

 Hust ; on both surfaces of the leaves ; sori at first bullate, at 

 length rupturing the epidermis, scattered, often confluent; spores 

 globose or nearly so, rather large, tawny-brown. — On Parfiassia 

 palustris. Irstead, Norfolk. September, 1864. 



Triehobasis Epilobii, Berk. Willow-herb Rust; spots 

 yellowish; son subrotund, scattered, surrounded by the ruptured 

 epidermis, often on the under surface ; spores subglobose, brown. 



